I’m an uncut guy, but I have switched to wearing my foreskin back and keeping my glans exposed all the time. As a result, my glans has changed to be much more like on a cut guy. Before I started skinning back full time, my glans was quite sticky, and extremely sensitive to direct stimulation, to the point that directly touching it or even lightly stroking it with my fingertip was almost painfully intense, rather than pleasurable. In that state, slowly peeling back my foreskin was quite pleasurable, as there would be a ring of unsticking that would move back along the glans providing a nice pleasurable sensation that it is otherwise hard to describe. Sliding the foreskin forward again was more subtle and only mildly pleasurable. When masturbating and sliding my foreskin back and forth quickly over my glans, it was less about the feeling of the foreskin itself, but my finger and thumb or fist gliding back and forth over the glans, though a double layer of skin, so the stimulation was more muted and there was no friction. Alternatively, I also enjoyed pulling my foreskin back and forth on the shaft. That would tug on the frenulum, which was intensely pleasurable. The foreskin itself would roll back and forth over the edge of the glans which was also nice.
Now that I’ve been pulled back full time for a long time, my glans has changed. It is now dry instead of sticky, so there is no longer that Velcro-like unsticking. The foreskin just slides smoothly back. My glans response to stimulation has changed as well. It is no longer very sensitive to light touches, and it never has the painfully intense sensitivity. And instead, I now find direct and firm stimulation quite pleasurable. As these sensation changes happened, I found that the more subtle and indirect sensations of the foreskin rolling back and forth over the glans just didn’t provide as much pleasure anymore, so I transitioned to different masturbation methods, like jerking the shaft right behind the glans, or holding the skin back tight and stroking with lube.
For what it’s worth, I find sex and masturbation equally or more pleasurable now that before.